| commit | b0f1e7962f93a78630161c7c9fc263de43c101ac | [log] [tgz] |
|---|---|---|
| author | David S. Miller <davem@davemloft.net> | Thu Sep 11 23:36:32 2008 -0700 |
| committer | David S. Miller <davem@davemloft.net> | Thu Sep 11 23:36:32 2008 -0700 |
| tree | e08a62bdbee47a327f6d80b3d83942f6b7eb9941 | |
| parent | 17f04fbb0f7153d95ec33da81189b113cc778157 [diff] |
sparc64: Define WANT_PAGE_VIRTUAL As sparse warns, without this struct page pointer subtraction is extremely expensive, and this is a pretty common operation in fast paths. With this define struct page becomes 64 bytes which makes for a simple subtract and shift, instead of a costly divide or reciprocol multiply. Signed-off-by: David S. Miller <davem@davemloft.net>